Improved steam-engine



eluded Stairs geen cpm.

ALD-EN KILBY, OFABiOSTON, MASSACHUSETTS.

Letters Patent No. 95,4486, dated October 5, .1869.

rMPRovEn STEAM-ENGINE.

'..hev8c:hc3.u1..l referred to in these Letters Patent and making part f the same.

HWF- To all whomit may concern Be it known that I, ALDEN KILBY, of the city of Bos ton, county of Snifolk, and State ofMassachusetts, have invented a new and improved Steam-Engine; and I do declare that the following is a full and exact description thereof, reference being had to the accompanying drawings, and to the letters of `reference marked thereon.

The nature of my invention consists in providing a y double-acting piston with a new method of reversing the engine, and a new method of operating the valve.

I Wish it distinctly understood that my engine is not a rotary, and is' entirely distinct from any and all rotary engines which have ever been invented.

To enable others skilled'in the art to make and use myinvention, I will proceed to describe its construction and operation.

Figure 1 is a perspective view.

Figure 2 is an elevation of the cylinder with the head removed, showing the valve and the method of operating it.

Figure 3 is an elevation of the back of the valve.

Figure 4 is a cross vertical section through the 'eentre ofthe cylinder'. A

Figure 5 is a horizontal sect-ion' through the centre ofthe cylinder.

Figure 6 is an elevation of the endof the cylinder, showing the reversing-lever and the steam-pipe.

Figure 7 shows the piston and the exhaust-pipes.

Figure 8 shows the valve-seat, with the steam-ports and exhaust-ports.

Iufig. 1, A' is the engine-bed; B is the balancewheel; C is the cylinder; D is the connecting-rod and cranks; E is the' exhaust.

luiig. 2, F is the pin which confines the valve G to the journal H., The partial revolution ofthe journal H moves the pin F, which, striking against the dogs 1, moves the valve G right and left, and thus opens the ports M for steam and for exhaust at the same time.

K is the slotl in the'valve G, in which the reverse L (see fig. 4) travels.

Fig. 3 shows the back of the valve G, with the ports M, Sto., for steam. I

Fig. 4, vertical section, shows the reverse L, with the lever N.

Fig. 5, horizontal section, shows/ the piu F, in the journal H.

Fig. 6 shows the lever N to the reverse L, (seetig. 4,) with the steam-pipe O in the head P oi' the cylinder. (See fig. 1.)

Fig, 7 showsv the double-acting piston' Q and the exhaust It, the piston Q, describing a hali'circlc only.

Fig. 8 shows the valve-seat S, with the steam-ports M and the'exhaust-ports 1t. pivot of the reverse L in fig. 4.

The advantages of my engine are as follows:

Itis very much more simple in construction, and therefore less liable to get ont ot' order; costs very much less to manufacture; takes up very much less room; has less friction, dispensing with slides, crossheads, and eccentrics; and has greater power than ordinary'machines of the saine size. 1t-is easily and quickly reversed, and is adapted to locomotives and steamboats, aswell as to ordinary manufacturing-purposes. It requires much less skill to manipulate, and 'is handled with perfect ease by the engineer.

I do not claim that any less steam is required to run my machine, except what may be saved by less friction in dispensing with slides, cross-head, and eccentric.

What I claim as my invention, and desire to secure by Letters Patent, is

1. A duplicated pistou, constructed substantially as above described, thereby securing double the power for the same' sized cylinder.

2. The manner of opera-ting the valve, by nieausof the pin F, through the piston-shaft or journal H.

3. Lhe device L, iu fig. 4, for reversing the valve.

ALDE.' KILBY.

Witnesses:

JAMEs H.Ro1mu'rs,

G. W. MECUM.

l is the hole for the 

